Papers by Christian Dufour
— This paper presents a simulation method that combines state-space analysis with a nodal method ... more — This paper presents a simulation method that combines state-space analysis with a nodal method for the simulation of electrical systems. This paper extends the concept of a discrete companion branch equivalent of the nodal approach to state-space described systems, and enables natural coupling between them, without any delay. The flexible clustering of state-space described electrical subsystems into a nodal method has the following advantages: first, the nodal admittance matrix can be constrained in size while still permitting the solution of a switched network by nodal admittance matrix on-line triangularisation. Also, each group can have a precalculation of all internal modes (caused by switches, for example) within itself, an important feature for real-time applications. Secondly, the state-space formulation enables the use of higher-level discretization methods with L-stability properties. Finally, the approach enables the coupling of complex nodal-based models like FD-line into a state-space based solver. The method is implemented in a commercial real-time simulation software tool, the Advanced Real-Time ElectroMagnetic Simulator (ARTEMiS).
IEEE Control Systems Magazine, 2005
... Semiconductor-based devices such as diodes, thyristors, and transistors are basic components ... more ... Semiconductor-based devices such as diodes, thyristors, and transistors are basic components of power electronic con-verters. Since these devices behave as switches that control energy flow through a By Nicolas Léchevin, Camille Alain Rabbath, and Christian Dufour ...
This paper will present results on the real time and rapid simulation of a Proton Exchange Membra... more This paper will present results on the real time and rapid simulation of a Proton Exchange Membrane (PEM) based fuel cell hybrid electric vehicle. The fuel cell hybrid vehicle (FCHV) is composed of a battery, a fuel cell, a DC-DC converter and a PMSM motor drive. The converters in the circuit are modeled with special interpolating IGBT bridge models (RT-Drive Time Stamped Bridges) that are very accurate despites the 10 kHz carrier frequency and the 10 microseconds sample time of simulation. The detailed Emmeskay PEM fuel cell stack model is used for the simulation. In the paper, the RT-LAB system is demonstrated to accelerate simulation by a factor greater than 1000 and help decrease the development cycle time of FCHV.
This paper presents real-time simulation results of a permanent magnet synchronous machine (PMSM)... more This paper presents real-time simulation results of a permanent magnet synchronous machine (PMSM) drive in faulty and non-standard modes and validates these against an actual industrial PMSM drive system. The paper will put emphasis on the test of special and faulty modes in PMSM drives. Results of real-time simulation of a PMSM drive with an open phase and in passive
2010 IEEE Vehicle Power and Propulsion Conference, 2010
This paper describes the usage of Hardware-In-the-Loop technologies at Ford Motor Company for the... more This paper describes the usage of Hardware-In-the-Loop technologies at Ford Motor Company for the development of hybrid vehicle cars. At the heart of these HIL tests are models of electric motor drives. Several challenges exist in executing these models in real-time, especially in faulty or uncontrolled modes. This paper describes the key features of these drive models, as well as
IEEE Transactions on Magnetics, 2000
This paper describes the RT-LAB real-time simulator implementation of the Hardware-In-the-Loop si... more This paper describes the RT-LAB real-time simulator implementation of the Hardware-In-the-Loop simulation of a fuel cell hybrid electric vehicle system with several 10 kHz converters. The paper demonstrates the necessity to use special IGBT bridge models that implements interpolation techniques within fixed time step simulation scheme. The paper reports on the latest advances from Opal-RT to simulate this kind of system with a 10 µs sample time. HIL computational time measurement are provided as well as a model fidelity comparison made by Toyota Motor Corp. of the RT-LAB Electrical Drive Simulator versus an actual fuel cell hybrid electric vehicle.
2009 13th European Conference on Power Electronics and Applications, 2009
Power systems today are undergoing a full mutation, primarily due to the opening of power markets... more Power systems today are undergoing a full mutation, primarily due to the opening of power markets, evolution of technology, exhaustion of natural resources, and dramatic changes in climate. In order to respond to these challenges, countermeasures that leverage power electronic converter technology must be taken at all the levels of the power system: generation, transport and distribution. Due to their
This paper proposes a method to stabilize a power hardware-in-the-loop (PHIL) simulation of induc... more This paper proposes a method to stabilize a power hardware-in-the-loop (PHIL) simulation of inductor coupled systems, in which real time simulator causes instability due to the introduced time delay of the system. The configuration of the PHIL simulation is described and the focused issue is the instability problem of the PHIL simulation. The causes for the instability are analyzed and a solution to stabilize the simulation is proposed and verified by off-line simulation of the investigated system.
2006 IEEE Power Engineering Society General Meeting, 2006
Abstract A controlled system consists of controller and con-trolled plant. After a controller ha... more Abstract A controlled system consists of controller and con-trolled plant. After a controller has been designed and built, it is essential to conduct closed-loop tests to verify the controller's performance. This obviously requires that the controlled plant be available. For many ...
2005 European Conference on Power Electronics and Applications, 2005
Page 1. Real-Time HIL Simulation of a Complete PMSM Drive at 10 µs Time Step Simon Abourida, Jean... more Page 1. Real-Time HIL Simulation of a Complete PMSM Drive at 10 µs Time Step Simon Abourida, Jean Bélanger, Christian Dufour, Opal-RT Technologies, Inc. 1751 Richardson, #2525 Montreal, Quebec, Canada Tel.: +1 / (514) 935.23.23. Fax: +1 / (514) 935.49.94. ...
2005 International Conference on Power Electronics and Drives Systems, 2005
Opal-RT Technologies inc. 1751 Richardson, #2525 Montreal (Quebec), H3K I G6, Canada {christian.d... more Opal-RT Technologies inc. 1751 Richardson, #2525 Montreal (Quebec), H3K I G6, Canada {christian.dufour, simon.abourida,jean.belanger}[email protected] ... Abstract -- This paper presents the RT-LAB Electrical Drive ... Simulator technology along with practical applications. The ...
APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335), 2002
Page 1. Real-Time PC-Based Simulator of Electric Systems and Drives APEC 2002 Simon Abourida, Chr... more Page 1. Real-Time PC-Based Simulator of Electric Systems and Drives APEC 2002 Simon Abourida, Christian Dufour, Jean Bélanger Guillaume Murere, Nicolas Léchevin, Biao Yu Opal-RT Technologies, Inc. 1751 Richardson ...
Computational Analysis, Synthesis, & Design Dynamic Systems, 2012
2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA), 2010
This paper presents a simulation method that combines state-space analysis with a nodal method fo... more This paper presents a simulation method that combines state-space analysis with a nodal method for the simulation of electrical systems. This paper extends the concept of a discrete companion branch equivalent of the nodal approach to state-space described systems, and enables natural coupling between them. The flexible clustering of state-space described electrical subsystems into a nodal method has the following advantages: first, the nodal admittance matrix can be constrained in size while still permitting the solution of a switched network by nodal admittance matrix on-line triangularisation. Also, each group can have a precalculation of all internal modes (caused by switches, for example) within itself, an important feature for real-time applications. Secondly, the state-space formulation enables the use of higher-level discretization methods with L-stability properties. Finally, the approach enables the coupling of complex nodal-based models like FD-line into a state-space based solver. The method is implemented in a commercial real-time simulation software tool, the Advanced Real-Time Electro-Magnetic Simulator (ARTEMiS).
2014 IEEE Vehicle Power and Propulsion Conference (VPPC), 2014
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Papers by Christian Dufour